Secondary education and schools

There are many organ systems in the human body, each of which needs constant replenishment of nutrients and removal of metabolic products. For this purpose, blood, which is the main transport medium, copes. However, there are also tissues that are devoid of blood vessels. What they are called and how they are fed should be considered in more detail. Last modified: 2025-01-23 12:01

There were many obstacles in the development of biology, some of which stemmed from the desire to juggle the facts under the divine origin of life. Such views resulted in classical and medieval transformism. This doctrine, which turned out to be a strong brake on the development of science, is a philosophical direction about the study of the origin of life. Last modified: 2025-01-23 12:01

One of the main properties of a living organism is movement or response to an irritating factor. In developed organisms, movement is a muscular act, the implementation of which is achieved due to the influence of a nerve impulse on a muscle. However, in elementary organisms, movement and response to stimulation take on a somewhat different form. In general, these phenomena are united in the concept of "taxis". Last modified: 2025-01-23 12:01

The Black Sea is one of the most beautiful places in our country, it is unique and has its own interesting features. It has its own riddles and secrets. The area of the Black Sea is constantly growing, as well as the coastal mountains. Last modified: 2025-01-23 12:01

The Sea of Azov is the inland sea of Europe, located within the borders of Ukraine and Russia. Its area is 39 thousand square meters. km. The reservoir belongs to the basin of the Atlantic Ocean. The depth of the Sea of Azov is average, does not even reach 10 m, the maximum is about 15 m. Last modified: 2025-01-23 12:01

Landlocked countries tend to suffer from a range of problems. First of all, the process of selling finished products on the world market is becoming more complicated. What modern states are deprived of access to the oceans and how does this affect their economy and well-being?. Last modified: 2025-01-23 12:01

Have you noticed that some people like it when others are uptight and on their nerves. And others speak out, at times, too straightforwardly, but honestly, although they are well aware that they will be punished for this. Most people want their life to be turbulent and unpredictable, if not personal, then at least social. They lack drama. So, in the topic of today's publication, we will consider what it means to dramatize. Last modified: 2025-01-23 12:01

Everyone knows that air pressure is measured in millimeters of mercury, since this unit of measurement is used in everyday life. In physics, in the International System of Units (SI), pressure is measured in pascals. The article will tell you how to convert millimeters of mercury to pascals. Last modified: 2025-01-23 12:01

In Russian, there are six main cases that we most often use in life. In addition, some linguists identify about 7 additional ones, which are rarely used, but nevertheless have the right to exist. What are the cases of the Russian language? In this article, we will talk about this in more detail. Last modified: 2025-01-23 12:01

There is such a phrase "colloquial expression". It means words that are not related to the literary norms of the Russian language. In vernacular, villagers are often "accused". Their colloquial speech does not correspond to generally accepted literary norms. But in fact, in addition to the "old generation", the Russian language is also distorted by the younger one. All this is discussed in the article. Last modified: 2025-01-23 12:01

Detailed linguistic digression into the etymology of the word "apogee". As well as a description of the direct and figurative meaning of this word in Russian. In the article you can find examples of use and find out where the word "apogee" came from. Last modified: 2025-01-23 12:01

Obtaining a secondary education in Russia is considered mandatory. This is a constitutional norm, and it is free for everyone. But is the level of this education the same in different educational institutions?. Last modified: 2025-01-23 12:01

How the organs are located in the body, the principle of their work and the structure of the general structure should be known to every educated individual. That is why human anatomy has been studied since school. Last modified: 2025-01-23 12:01

Unions… What are they for? Let's start with what a union is. And this is a service word that performs the function of combining words syntactically in sentences and parts of sentences. It indicates the nature of the offer. Learn how to use and correctly use the union "namely". Last modified: 2025-01-23 12:01

A man without a creed is like a bird without wings. Let's see what a credo is and why a person needs it at all. Why is a credo so necessary in the work of a teacher, and where should it be taken from? Why is this one of the components of the successful work of a teacher?. Last modified: 2025-01-23 12:01

The largest land mammal that exists in modern nature is the elephant. Who can stop the raging giant? Is it really possible to frighten a fearless giant? Before whom does the animal freeze and to whom does it obey?. Last modified: 2025-01-23 12:01

Rocks don't rain often. Investigate this phenomenon very carefully. Scientists collect fragments of a meteorite, which are scattered for many kilometers. Further, their composition is investigated, the effect of the atmosphere on the fireball, the origin of the body is assumed. Fragments of meteorites of various chemical composition are kept in museums of different countries. Last modified: 2025-01-23 12:01

Line spectra - this is perhaps one of the important topics that are considered in the 8th grade physics course in the optics section. It is important because it allows us to understand the atomic structure, as well as to use this knowledge to study our Universe. Let's look at this issue in this article. Last modified: 2025-01-23 12:01

Tact - what is it? When we talk about her, we tend to imagine a polite person who treats others with respect. But in fact, there is a difference between politeness and tact, what is it? To answer this question, we will give information about the latter in more detail. Last modified: 2025-01-23 12:01

Area is an area on the surface of the earth or water, which is occupied by a particular species of plants, animals, fish. There is even a science that studies the patterns of appearance, development, existence of areas - areology. Man's influence on his own planet is such that we can deliberately or accidentally move, destroy, and sometimes create an area for a certain type of creatures. Last modified: 2025-01-23 12:01

The indigenous population of Abkhazia came from the ancient peoples of the Western Caucasus. In the Assyrian inscriptions of the times of King Tiglathpalasar, they were mentioned as Abeshla, in ancient sources these are the tribes of the Abazgs and Apsils. Last modified: 2025-01-23 12:01

Becky Thatcher is one of the minor characters in the novel "The Adventures of Tom Sawyer" by Mark Twain. In the book, several key moments are connected with the girl, which vividly show her personality. In this article you can find all the information about the heroine and its brief description. Last modified: 2025-01-23 12:01

Chemistry around us is much more than the average citizen can imagine. Without doing science professionally, we still have to deal with it in our daily lives. Everything that is on our table consists of chemical elements. Even the human body is made up of dozens of chemicals. Last modified: 2025-01-23 12:01

Breakthrough is a word we hear a lot with the adjectives "scientific" and "technological". But there are other breakthroughs in life - pipes or batteries. We will not exclude one or the other, we will tell about all the meanings of the word. Last modified: 2025-01-23 12:01

The article talks about what a national park is. Why they are created, how they differ from reserves and what are reserves. Last modified: 2025-01-23 12:01

Since many people have problems with writing essays during school time, this, of course, needs help. The article helps to understand the nuances of writing essays. Last modified: 2025-06-01 07:06

In the plant world, the most perfect and numerous group is the department of angiosperms or flowering plants. These include all plants that are equipped with an organ of seed reproduction - a flower. In total, there are more than 350 thousand different plant species on the planet, and of these, ¾ of them belong to angiosperms. They can easily grow in water, arid deserts and cover the lands of the steppes with a multi-colored carpet. Last modified: 2025-01-23 12:01

Centner is a measure of weight. How to convert centners to kilograms, and kilograms to centners. An article on how to easily translate weight: gram, centner, ton, kilogram. Last modified: 2025-06-01 07:06

Caucasus is a beautiful geographical area, located mainly on the territory of the majestic mountains of Eurasia. This region is located closer to the southern edge of the East European Plain, at the turn of Europe and Asia, and it is washed by the waters of the Black Sea on the western side and the Caspian Sea on the eastern side. Last modified: 2025-01-23 12:01

In physics, the concept of "heat" is associated with the transfer of thermal energy between different bodies. Due to these processes, heating and cooling of bodies, as well as a change in their states of aggregation, occurs. Let's take a closer look at what heat is. Last modified: 2025-01-23 12:01

How does an atom work? What is called the core? What is the electron shell? What were the building patterns?. Last modified: 2025-01-23 12:01

Newton's second law is perhaps the most famous of the three laws of classical mechanics that an English scientist postulated in the middle of the 17th century. Indeed, when solving problems in physics for the movement and balance of bodies, everyone knows what the product of mass and acceleration means. Let us consider in more detail the features of this law in this article. Last modified: 2025-01-23 12:01

Geographic coordinates - latitude and longitude - are determined by the intersection point of two imaginary lines - the parallel and the meridian. The longest parallel from which latitude begins is the equator. Last modified: 2025-01-23 12:01

Which is harder, granite or marble, nickel or aluminum? And what is hardness anyway? We will try to answer these questions in our article. A number of foreign scientists de alt with the problem of determining the hardness of minerals and substances. Among them are Albert Schor, Friedrich Moos, Johan August Brinell, William Vickers and others. However, the only and generally accepted method for calculating hardness in science still does not exist. Last modified: 2025-06-01 07:06

Dip and river regime are key hydrological parameters. According to them, one can get an idea of the water content, the nature and speed of the flow of a particular watercourse. What is the fall of the river? How to correctly calculate its slope? What determines the regime of a particular river? We will consider the answers to all these questions in our article. Last modified: 2025-01-23 12:01

When asked where the Ore Mountains are located, there are several answers. The most famous mountain range of the same name on the border of Bohemia (Czech Republic) and Saxony (Germany). This region has been known since ancient times as a center for the extraction of copper, silver, tin, and iron. It is one of the origins of metallurgy in Europe. Slovakia has its own Ore Mountains, representing a part of the Western Carpathians. This name is also found in the toponymy of other countries. Last modified: 2025-01-23 12:01

In any modern system of general education, mathematics occupies one of the central places, which undoubtedly indicates the uniqueness of this field of knowledge. What is modern mathematics? Why is she needed? These and similar questions are often asked to teachers by children. And each time the answer will be different depending on the level of development of the child and his educational needs. Last modified: 2025-01-23 12:01

Laziness has always been ridiculed and condemned by the people. There are many proverbs about laziness and work that are relevant in our time. Last modified: 2025-01-23 12:01

The Mexican flag may remind someone of the symbol of Italy. But in fact, these panels have a completely different story. Last modified: 2025-01-23 12:01

Linguists distinguish such a thing as syllables. Language learners need to be able to correctly determine their boundaries in words and distinguish them by type. Consider the most basic types of syllables, as well as the rules for division. Last modified: 2025-01-23 12:01